Thursday I pulled the trigger on a gobbler and heard what sounded like a muffled 22 short shell going off, I then saw some smoke coming from the action area of my Mossy 835 ! I waited a couple minutes till the danger of a hang fire was over. I started opening up the action, I looked the case over well and the primer was hit hard and I saw no unburned powder anywhere ! The wad was stuck in my barrel so I went home and bumped it back out the action and I never saw any unburned powder ! I feel the only explanation is that there somehow wasn't a main charge put in this round ! I have used this brand turkey loads for over 40+ years and have had no trouble up until now ! The Brand is Federal and the shells are several years old but are kept in a gun safe. After removing the wad from my barrel and examining the gun for damage, I determined there was none and got a 2&3/4 inch small game load out that was over 10 years old and tried the gun and it went BOOM ! I sent Federal an E-Mail Thursday night but have not heard anything back from them ! I have used other shells out of this box of 10 and had no problem with them, I have never noticed any Federal rounds that didn't sound right in the past either ! I have had Remington shot shells misfire when they appeared that the primer was hit hard enough that they should have fired, but I have never seen where a primer had worked and not ignited the main charge, in any type shell ! This was a 3&1/2" Magnum with 2oz of # 5 shot !